Dr. Gurpreet Singh, 30, of Bangor did not enter the pleas in person at the Penobscot Judicial Center. His attorney, Jeffrey Silverstein of Bangor, entered the pleas on his behalf.

Silverstein also entered not guilty pleas to the same charges on behalf of Singh’s father, Harbhajan Singh, 65, of Bangor.

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The men’s next court dates have not been set.

Both men remain free on bail. Conditions, including provisions of no contact between the defendants and the victims, remain in place.

The Singhs were arrested July 20 after Bangor police responded to a report of a domestic disturbance at a residence off Stillwater Avenue, according to a previous report.

When Bangor police Officer Brian Smith arrived, a very upset and frantic woman told the officer that her husband and father-in-law threatened to throw her daughter out of their home’s second-story window, according to officials.

The 27-year-old woman was holding her baby when Smith arrived and gave it to the officer as she tried to explain what had happened. The woman told Smith that both men were arguing with her about the baby’s sex. The younger Singh had been very upset with her since the day he found out he was not going to have a son, she told the officer.

The issue over her not producing a boy became more volatile when an argument started over the sex of the baby again on July 20, and, during that argument, according to the mother, both men tried to grab the infant girl from her arms and threatened to throw her out of the second-story window.